/*
 * Copyright (C) 2014 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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#ifndef SKY_ENGINE_PLATFORM_FONTS_CHARACTER_H_
#define SKY_ENGINE_PLATFORM_FONTS_CHARACTER_H_

#include "flutter/sky/engine/platform/PlatformExport.h"
#include "flutter/sky/engine/platform/text/TextDirection.h"
#include "flutter/sky/engine/platform/text/TextPath.h"
#include "flutter/sky/engine/wtf/HashSet.h"
#include "flutter/sky/engine/wtf/text/WTFString.h"
#include "flutter/sky/engine/wtf/unicode/CharacterNames.h"

namespace blink {

class PLATFORM_EXPORT Character {
 public:
  static CodePath characterRangeCodePath(const LChar*, unsigned) {
    return SimplePath;
  }
  static CodePath characterRangeCodePath(const UChar*, unsigned len);

  static bool isCJKIdeograph(UChar32);
  static bool isCJKIdeographOrSymbol(UChar32);

  static unsigned expansionOpportunityCount(const LChar*,
                                            size_t length,
                                            TextDirection,
                                            bool& isAfterExpansion);
  static unsigned expansionOpportunityCount(const UChar*,
                                            size_t length,
                                            TextDirection,
                                            bool& isAfterExpansion);

  static bool treatAsSpace(UChar c) {
    return c == ' ' || c == '\t' || c == '\n' || c == noBreakSpace;
  }
  static bool treatAsZeroWidthSpace(UChar c) {
    return treatAsZeroWidthSpaceInComplexScript(c) || c == 0x200c ||
           c == 0x200d;
  }
  static bool treatAsZeroWidthSpaceInComplexScript(UChar c) {
    return c < 0x20 || (c >= 0x7F && c < 0xA0) || c == softHyphen ||
           c == zeroWidthSpace || (c >= 0x200e && c <= 0x200f) ||
           (c >= 0x202a && c <= 0x202e) || c == zeroWidthNoBreakSpace ||
           c == objectReplacementCharacter;
  }
  static bool canReceiveTextEmphasis(UChar32);

  static inline UChar normalizeSpaces(UChar character) {
    if (treatAsSpace(character))
      return space;

    if (treatAsZeroWidthSpace(character))
      return zeroWidthSpace;

    return character;
  }

  static String normalizeSpaces(const LChar*, unsigned length);
  static String normalizeSpaces(const UChar*, unsigned length);

 private:
  Character();
};

}  // namespace blink

#endif  // SKY_ENGINE_PLATFORM_FONTS_CHARACTER_H_
